Affiliation:
1. Shandong Provincial Key Laboratory of Laser Technology and Application, and Shandong University
2. University of Science and Technology Beijing
3. Shandong University
Abstract
We firstly report a high pulse repetition rate (101.4 MHz) nonlinear post-compression based on the normal dispersion fiber (NDF) operating in 2-µm wavelength region. With only one-stage NDF-based nonlinear pulse compressor, the 2-µm ultrafast laser pulses are compressed from ∼460 fs down to 70 fs, corresponding to ∼10.4 optical oscillation cycle. With two-stage nonlinear pulse compressor, the input ultrafast laser pulses are further compressed to 28.3 fs (∼4.3 optical oscillation cycle). In each case, the average power of the compressed 2-µm laser pulses exceeds 1 W, which is believed to be the highest average power never achieved at ∼100-MHz pulse repetition rate. The efficiencies of the one-stage and two-stage nonlinear pulse compressors are 64% and 47% respectively.
Funder
High-level Talent Cultivation Funds of State Key Laboratory of Crystal Materials of Shandong University
Taishan Scholar Foundation of Shandong Province
Qilu Young Scholar Program of Shandong University
Natural Science Foundation of Shandong Province
National Natural Science Foundation of China
Subject
Atomic and Molecular Physics, and Optics